@BOOK{modular_design,
   author = "Baldwin and Clark",
   title = "Design Rules, Vol.1: The Power of Modularity",
   publisher = "The MIT Press",
   edition = "First",
   year = 2000
   }
   
   
@ARTICLE{feedback_module1,
   AUTHOR  = "Gediminas Adomavicius and Alexander Tuzhilin",
   TITLE   = "Toward the Next Generation of Recommender Systems: A Survey of the State-of-the-Art and Possible Extensions",  
   YEAR    = 2005,
   JOURNAL = "IEEE Transactions on knowledge and data engineering",
   VOLUME  = 17,
   NUMBER  = 6,
   PAGES   = 12,
    }
    
    @INPROCEEDINGS{feedback_module2, 
	   AUTHOR  = "Ryen W. White, Joemon M . Jose and I. Ruthven",
   	TITLE   = "Comparing explicit and implicit feedback techniques for web	retrieval: TREC-10 interactive track report", 
	booktitle="Proceedings of Text Retrieval Conference - 10 (TREC 2001)",
	PAGES = 1,
	MONTH = "November",
	YEAR=2004
	}
 
    @BOOK{testing_1,
   author = "Glenford J.  Myers",
   title = "The Art of Software Testing",
   publisher = "John Wiley \& Sons, Inc",
   edition = "Second",
   year = 2004
   }
   
   
   @INPROCEEDINGS{swrs, 
   	AUTHOR="Cai-Nicolas Ziegler", 
	TITLE="Semantic Web Recommender Systems",
	booktitle="Proceedings of the Joint ICDE/EDBT Ph.D. Workshop", 
	YEAR=2004
	}
   
   @misc{nielsen,
   AUTHOR  = "Jakob Nielsen and Rolf Molich",
   TITLE   = "Heuristic Evaluation of User Interfaces",  
   YEAR    = 1990,
   howpublished="\url{http://www.phillips.rmc.ca/courses/459-2007/lectures/03-heuristic-list.pdf}"
    }

 @misc{
 	     LF,
 	     Author = "Last.fm",
              Title = "Last.fm {W}eb {S}ervices",
              Year = "2010",
              Howpublished = {\url{http://www.last.fm/api/intro}}
 }


